<template>
  <div id="app">
    <nav>
      <router-link to="/">商品列表</router-link> |
      <router-link to="/about">商品详情</router-link>
    </nav>
    <keep-alive exclude="about">
      <router-view />
    </keep-alive>
    <!-- include是缓存谁 
    exclude 是不缓存谁 
    是根据组件的name定义的 -->
  </div>
</template>
<script>
export default {};
</script>

<style lang="scss">
#app {
  font-family: Avenir, Helvetica, Arial, sans-serif;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-align: center;
  color: #2c3e50;
}

nav {
  padding: 30px;
  position: fixed;
  left: 50px;
  bottom: 30px;

  a {
    font-weight: bold;
    color: #2c3e50;

    &.router-link-exact-active {
      color: #42b983;
    }
  }
}
</style>
